Here's what we were both thinking after the hand. Clearly we are not on the same wavelength here...
North: "hmm, unlucky -1 here. Bad score though because they can't make 4C"
South: "ugh, partner, why did you have to raise to 4? I was merely competing"
North: "don't like my defensive prospects against 4C - also, you have probably only one club, I've got a 6-4, and the way I play 3S there you've shown extras... wait, what, you opened a 10-count?!"
South: "yea, got both majors and a nice shape, both nonvul so need to compete for the partscore"
I dived into Robson and Segal's "Partnership Bidding at Bridge - the contested auction" and found a couple of references to similar auctions where they recommend using Lebensohl to show a weak hand and a direct bid would be stronger. But if you're not playing that (and besides, the opps went to 3C already), do you take 3S as merely competitive or does it show extras (about an ace more than South had here)? Any other comments on the auction (would you open South, would you X with North?)
As a related question, I notice people are now playing the X in an auction like 1H-(p)-1S-(2C)-X as just competitive even with minimum values, not showing a strong-NT-type hand like I was originally taught. In that case, what kind of hand would pass rather than X here? I always thought one should pass if they don't really have anything new to say.
Thanks,
ahydra